What is a drawbar in the spindle?
A drawbar or spindle drawbar is a clamping mechanism for toolholders on machine tools. The toolholder or machine taper itself is held by the drawbar and applies force to the spindle, especially when spinning at low speeds.
What is the main purpose of the drawbar?
The drawbar in a machine tool spindle supplies the force that keeps the tool and toolholder assembly in the spindle even as centrifugal forces tend to open the spindle nose as the spindle rotates.
What is a power drawbar?
The Power Drawbar is a CNC-class pneumatic system that automates the task of loosening and tightening the drawbar when changing a tool on a milling machine. This greatly expedites the tool changing process and adds a great deal of convenience.
How does a CNC spindle work?
A spindle is devised of a motor, a taper for holding tools, and a shaft that holds together all the separate components. Spindles rotate on an axis, which receives input on movement from the accompanying CNC controller.
What is maximum drawbar pull?
In automotive engineering, drawbar pull is the amount of horizontal force available to a vehicle at the drawbar for accelerating or pulling a load. Drawbar pull is the difference between tractive effort available and tractive effort required to overcome resistance at a specified speed.
How does a spindle drive work?
Spindle drives convert the power generated by the motor into feed velocity and feed force. The integrated axial bearing can take extremely high axial loads. maxon spindle drives are available with metric, ball screw, and trapezoidal screw spindles. Compact design with directly attached spindle.
How is drawbar power calculated?
Power (kW) = To × N 9549 where kW = kilowatts; To = torque (Nm); N = speed (rpm). Drawbar power (Dbhp) is power measured at the point implements are attached to the tractor, drawbar or 3 point hitch.